You can only use the (2)nd effect of “Invocation” once per turn.
(1) Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters from your hand as Fusion Materials. If Summoning an “Eidolon Beast” Fusion Monster this way, you can also banish monsters from your field, your Graveyard, and/or your opponent’s Graveyard as Fusion Material.
(2) If this card is in your Graveyard: You can target 1 of your banished copies of “Aleister the Invoker”; shuffle this card from your Graveyard into the Deck, and if you do, add that monster to your hand.